Cognate: 1253diákrisis (from 1252/diakrínō, see there) – properly, a thorough judgment, i.e. a discernment (conclusion) which distinguishes "look-alikes," i.e. things that appear to be the same. (Note the intensifying force of the prefix, dia.) See also 1252 (diakrínō).

Example: Heb 5:14: "But solid food relates to mature people (5046/téleios), of those having the sense-faculties trained ('exercised,' Gk perfect tense) on account of the habit – [namely] for (4314/prós) discernment (1253/diákrisis), of both good ('in combination with,' 5037/té] and [what is] miserably-bad."

διάκρισις, διακρισεως, ἡ (διακρίνω), a distinguishing, discerning, judging: πνευμάτων, 1 Corinthians 12:10; καλοῦτέκαίκακοῦ, Hebrews 5:14; μήεἰςδιακρίσειςδιαλογισμῶν, not for the purpose of passing judgment on opinions, as to which one is to be preferred as the more correct, Romans 14:1 (see διαλοσμος, 1). (Xenophon, Plato, others.)

Romans 14:1N-AFPGRK:μὴ εἰς διακρίσεις διαλογισμῶν NAS: in faith, [but] not for [the purpose of] passing judgment on his opinions.KJV: to doubtful disputations.INT: not for decisions of thoughts

1 Corinthians 12:10N-NFPGRK:ἄλλῳ δὲ διακρίσεις πνευμάτων ἑτέρῳNAS: and to another the distinguishing of spirits,KJV: to another discerning of spirits;INT: to another moreover discerning of spirits and to a different one